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Optimum Regular Logical Topology for Wavelength Routed WDM Networks
Jittima NITTAYAWAN Suwan RUNGGERATIGUL
Publication
IEICE TRANSACTIONS on Communications
Vol.E88B
No.4
pp.15401548 Publication Date: 2005/04/01
Online ISSN:
DOI: 10.1093/ietcom/e88b.4.1540
Print ISSN: 09168516 Type of Manuscript: PAPER Category: FiberOptic Transmission for Communications Keyword: wavelength routed WDM networks, logical topology, node placement optimization, routing and wavelength assignment, optimization,
Full Text: PDF(1.8MB)>>
Summary:
Several regular topologies have been proposed to be used as the logical topology for WDM networks. These topologies are usually evaluated and compared based on the metrics related to network performance. It can be simply shown that this is generally not sufficient since better network performance can be achieved by increasing more network facilities. However, doing this eventually increases the network cost. Thus, the comparison of topologies must be performed by using an evaluation function that includes both the network performance metric and the network cost. In this paper, we propose a model to find the optimum regular logical topology for wavelength routed WDM networks. ShuffleNet, de Bruijn graph, hypercube, Manhattan Street Network, and GEMNet are the five wellknown and commonly used regular topologies compared in this paper. By solving the two subproblems on node placement optimization, and routing and wavelength assignment, we obtain the evaluation function used in the topology comparison. Numerical results show that GEMNet is the optimum logical topology for the wavelength routed WDM networks, where it can take one of the three forms of ShuffleNet, de Bruijn graph, and its own configurations.

